Whenever my engine is on idle it starts to rev up and down and the car shakes from the revving. The engine light comes on and I can smell rich odor from the exhaust. Please help me on advise. Thanks.
Whenever my engine is on idle it starts to rev up and down and the car shakes from the revving. The engine light comes on and I can smell rich odor from the exhaust. Please help me on advise. Thanks.
Vacuum leak or sticking idle control valve.
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